Tuesday, September 10, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
TUESDAY, SEPTEMBER 10, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0519E
SUNSET: 1802E
THE DRY SPELL CONTINUES WITH MORE SPLENDID WEATHER FOR EARLY SEPT….
With only 0.04″ of rain for the month to date (we’re now 1/3rd of
the way through the month), we have now exceeded 1″ below normal
in the rainfall department. There is currently no rain in sight
over the next week, so this dry spell looks to continue. It will
be interesting to see what the Drought Monitor shows on Thursday
morning for the region.
At any rate, today is yet another great weather day with plenty
of sunshine and near seasonal temperatures.
Temperatures have reached the mid-upper 70s early this afternoon
with dew point values that started in the mid 50s this morning,
but have dropped into the upper 40s early this afternoon. It really
doesn’t get much more comfortable than this time of year, and
it has been a wonderful stretch of early fall weather.
Winds are a bit gusty at times today, but overall not as busy as
it’s been the past few days. The average speed for the day so far
is around 9mph. The peak gust so far for the day is 20mph, which
has occurred twice, first just after midnight, and again during
the 1pm observation.
Visibility has once again been excellent with improving from
around 60 miles this morning to around 70 miles early this
afternoon.
The maximum temperature so far today is 77F, which is 2 degrees
above the normal high of 75F. The minimum temperature since midnight
is 56F, which is 2 degrees below the normal low of 58F.
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Today’s Observations:
7 A.M.
Weather: Clear, few altocumulus/castellanus distant WNW-NNW and
distant NNE-SSE, few cirrus distant NW-N
Temperature: 60F; Dew Point: 55F; Relative Humidity: 84%
Wind: WNW @ 7 kts
Sea-level pressure: 1017.5 mb; 30.05 in. Hg: rising, then more rapidly
Visibility: 60 miles
6-hr Max temp: 60F
6-hr Min temp: 56F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 60 175/60/55/2907/005/ FEW AC/ACC DSNT WNW-NNW AND
DSNT NNE-SSE FEW CI DSNT NW-N/ 8/081 53010 10060 20056
10 A.M.
Weather: Scattered cumulus, scattered altocumulus
Temperature: 70F; Dew Point: 53F; Relative Humidity: 55%
Wind: NW @ 7G16 kts
Sea-level pressure: 1017.9 mb; 30.06 in. Hg: rising, then falling
Visibility: 60 miles
3-hr Precip: 0.00 inches
BHO SA 1455 40 SCT 100 SCT 60 179/70/53/3207G16/006/ 8/250 50004
1 P.M.
Weather: Clear, few cumulus all quadrants, few altocumulus distant
NNW-NE, thin smoke layer aloft distant SSW-WNW
Temperature: 77F; Dew Point: 49F; Relative Humidity: 37%
Wind: NW @ 8G17 kts
Sea-level pressure: 1017.2 mb; 30.04 in. Hg: falling unsteadily
Visibility: 70 miles
6-hr Max temp: 77F
6-hr Min temp: 60F
6-hr Precip: 0.00 inches
BHO SA 1755 CLR 70 172/77/49/3208G17/004/ FEW CU ALQDS FEW AC DSNT
NNW-NE THN K LYR ALF DSNT SSW-WNW/ 8/250 57007 10077 20060
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SUMMARY FOR MONDAY, SEPTEMBER 9, 2024
TEMPERATURE (DEGREES F)
MAX…….75 NORMAL…..75
MIN…….51 NORMAL…..58
MEAN……63 NORMAL…..67
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..-4
TOTAL DEPARTURE FOR THE MONTH…………………….-14 [-1.8 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY…………….2 DEPARTURE………0
TOTAL HEATING UNITS FOR THE MONTH……………10 DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE SEASON…………..21 DEPARTURE……..-8
TOTAL HEATING UNITS LAST SEASON TO DATE……….3 DEPARTURE…….+18
COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-3
TOTAL COOLING UNITS FOR THE MONTH……………22 DEPARTURE…….-15
TOTAL COOLING UNITS FOR THE SEASON………….716 DEPARTURE…….+84
TOTAL COOLING UNITS LAST SEASON TO DATE……..662 DEPARTURE…….+54
PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all on Main Tower.
E=Estimated
F420C (Official)……….E31 WNW @ 02:45 P.M.
VECTOR #1 (1-Sec)……….28 WNW @ 11:12 A.M.
VECTOR #2 (1-Sec)……….30 W @ 02:44 P.M.
DAVIS #1……………….29 W @ 12:02 P.M.
DAVIS #2 ………………28 W @ 03:09 P.M.
RMY #1 (Instantaneous)…..30 WNW @ 02:45 P.M.
RMY #2 (Instantaneous)…..33 WNW @ 11:57 A.M.
MERLIN…………………28 W
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………22 W @ 11:39 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..20 @ 12:02 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..22 @ 02:45 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………22 W @ 12:02 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………22 WNW @ 02:45 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..20 W @ 12:02 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..21 W @ 02:45 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….12.1 W [291 total miles]
VECTOR #1……………..12.0
VECTOR #2……………..12.2
DAVIS #1………………12.4 WSW
DAVIS #2………………12.3 W
RMY #1………………..11.6 W
RMY #2………………..12.0 WSW
RICHARDS (C5C)………….OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.12
TOTAL PRECIPITATION FOR THE MONTH…………..0.04 DEPARTURE…..-1.02
TOTAL PRECIPITATION FOR THE YEAR (2024)…….41.25 DEPARTURE…..+5.58
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PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN)/SUN(%)/PEAK GUST/VEC1/RMY GUST
PEAK GUST: F420C (Official)
VEC1: Vector #1 1-second gust
RMY: R.M. Young #1 wind gust recording system (Instantaneous)
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M: Missing data
9/1 82/67/75/+6/T/244/31 28 SSW VEC1 27 SW RMY 28
9/2 79/56/68/-1/0.00/644/82 31 NNW VEC1 31 NNW RMY 32
9/3 74/49/62/-6/0.00/766/98 23 NW VEC1 23 NNW RMY 23
9/4 80/56/68/0/0.00/732/94 18 ESE VEC1 19 SE RMY 18
9/5 77/58/68/0/0.00/…/.. 20 ESE VEC1 19 ESE RMY 19
9/6 73/58/66/-2/0.00/…/.. 22 E VEC1 21 ENE RMY 23
9/7 77/56/67/0/0.04/…/.. 34 WNW VEC1 31 WNW RMY 33
9/8 70/50/60/-7/0.00/…/.. 35 W VEC1 35 W RMY 34
9/9 75/51/63/-4/0.00/…/.. 31 WNW VEC1 28 WNW RMY 30
9/10 The low since midnight is 56F, the daily normal low is 58F.
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SEPTEMBER DAILY RECORDS TO DATE
NONE.
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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR SEPTEMBER 10
HIGH 90F IN 1931,1989
LOW 41F IN 1956
PRECIP 5.60 INCHES IN 1999 (DAILY RECORD FOR SEPTEMBER)
PEAK GUST 48 MPH NW IN 1972
RECORDS FOR SEPTEMBER 11
HIGH 93F IN 1983, 2013
LOW 37F IN 1917
PRECIP 5.23 INCHES IN 1954 (HURRICANE EDNA)
PEAK GUST 101 MPH NW IN 1954 (HURRICANE EDNA)
TODAY’S REPORT PREPARED BY: Matt Douglas
